Deep-well pump



w. c.- PARRISH DEEP WELL PUMP Fild April 16, 192 4 Patented Nov. 20,

' UNITED STA WILLIAM G. PARRISH, OI ROB! ARTHUR, TEXAS.

DEEP-WELL PUMP.

- Application filed April 16, 1924. Serial No. 706,796.

This invention relates to pumps and more particularly to pumps employed in deep wells such as oil wells and the like.

Broadly stated it is the object of the presout invention to provide improved means for operating pumps of the character described capable of being employed at or near the bottom of relatively deep wells which are necessarily of small bore.

More particularly it is one object of the .invention to provide pump operating mechanism of simple and compact construction which'can be sunk to the bottom of a well and operated with a minimum of attention.

Another object relates to the provision of actuating means for such pumps which may" be placed in the well, in combination with a source of energy for energizing the actuating means, the source of energy being positioned apart from the well.

- Other objects will appear as the description of the invention progreses.

The accompanying figure of the drawing I illustrates a diagrammatic elevation of the apparatus for operating the pump.

previously to the timewhen it has reached the point of magnetic center with respect to its solenoid. Thus it will be observed that the armature 61 is shown at the position where it exerts its maximum pull and the several armatures beneath 61 are in positions of progressively decreasing pulling power. The preferred arrangement is to so adjust the length of the stroke of the shaft to the several armatures and their positions .with respect to the solenoids that the maximum pull is firstexerted by the armature at one end of the series, such as 61, and as the shaft moves the maximum pull is exerted by the other armatures in succession In the apparatus in the particular position illustrated armatures 61, 61 and 61 are at points of magnetic center with respect to their solenoids. It will be observed, however, that since the armatures are loosely .mounted on the shaft 24 that they do not impede the movement of the shaft when they are at points of magnetic center.

If desired, a plurality of sets of electromagnetic elements may be provided. Thus for example, two sets may be used, the

Referring to the drawing it will be seen several elements of each set being so arthat the pump shaft 24" connected at its ranged that when the total pull exerted on lower end to the pum (not shown) is arranged to be actuate by a plurality of electro-magnetic elements comprising armatures 61, 61, 61, 61", 61, 1*, 61 61", 61", and 61 with cooperating solenoids 62, 62", 62, etc. The armatures are mounted loosely on the shaft 24f and collars or shoulders 63 adapted to beeng'aged by the armatures are fixed to. shaft 24. The several solenoid coils 62,- 62*, 62, .etc. are connected in multiple with a suitable source of electrical energy. Thus the several coils are inrmultiple connection with lead wires 65 and 66, the latter :of which is connected to one of the terminals of a batte or other source of electrical energy 64. he conductor 65 is connected by means of ring contacts 67 and 68 to a conductor 69 w ich is connected to the other terminal of the source of power 64. A circuit controlle'r 70 is rovided for actuating the spring contacts 6 and 68..

The several armatures 613161 3615 etc. are so arranged with respect to the several field coils 62, 62, 62, etc. that the maximum pull. exerted byv each armature will.occur at a different time irithe cycle of operation as from that of the others. The maximum force exerted by an armature occurs just the shaft by the elements of one set is at a minimum the total pull exerted by the elements of theother set is at a maximum.

A modification of the invention is to provide in lieu of the slidably mounted armature 61", 61", etc. induction coils, using preferably two or three phase current.

Apparatus of preferred form and construction has been illustrated and described for the purpose of showing a way in which this invention may be practiced, but the inventive thought upon which this application is based is broader than this illustrative embodiment. It is therefore understood that the scope of the invention is not to be limited by the present disclosure, reference being had to the appended claims for that purpose.

What I claim is: 1 f

- 1. An electric motor adapted to produce reciprocating motion of substantially uniform power over the entire range of an unidirectional stroke which comprises I a movable \sha'ft a plurality of armatures mounted loose y. upon said shaft, collars f fixed on the shaft at equal intervals adapted to be engaged by the armatures, a plurality of solenoids connected in parallel and adapted to cooperate with said armatures,

said solenoids being equally spaced at inter- Vals less than'the-intervals at which the.

collars on the shaft are s aced, a source of electrical power for the so enoids and contact means for energizin said solenoids during the working stroke 0% the shaft.

2. An electric motor adapted to produce reciprocating motion of substantially uniform power over the entire range of. an unidirectional stroke which comprises a mo'v: able shaft, a plurality of movable armatures loosely mounted upon said shaft, a plurality of solenoids connected in parallel and adaptedto cooperate with said armatures,

collars fixed upon the shaft adapted to be engaged by the armatures, said collars so positioning said armatures with respect to the corresponding solenoids that the maximum pull exerted upon ,theshaft by each individual armature takes place at a differcut time from that of the other armatures, a

source of electrical power for the solenoids and contact means for energizing said solenoids during the working stroke of the shaft.

In witness whereof I have hereunto set my hand this 7th day of March, 1924.

WILLIAM c. PARRISH. 

